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4 – Infinity Kappa 255a Power Amplifier
APPLICATIONS (continued)
R
– ––
+ ++
L
R
– –
+ +
L
KAPPA 255a
(front panel)
KAPPA 255a
(rear panel)
REM
–
R
+
–
+
L
SUBWOOFER 1 and 2
are common outputs
and are supplied as
a convenience for
dual-subwoofer
applications
Subwoofer
-
+
+
-
+
-
L
Plate
+
-
R
Plate
R
Midbass
L
Midbass
+
-
ST
BR
HP
FLAT
LP
.25V
9V
G
A
I
N
G
A
I
N
G
A
I
N
M
O
D
E
M
O
D
E
O
U
T
P
U
T
C
R
O
S
S
O
V
E
R
.25V
9V
.25V
9V
80Hz
20Hz
320Hz
32Hz
60
Hz
Q
FREQ
REAR
INPUT
SUB
INPUT
MIN
MAX
320Hz
32Hz
320Hz
32Hz
FRONT LP
EXT
INT
EXT
ST
BR
SUBWOOFER
FRONT REAR
O
U
T
P
U
T
C
R
O
S
S
O
V
E
R
D
B
O
X
O
V
E
R
HP
FLAT
LP
x1
x15
Set Switches As Shown
(set controls for your system plan)
Set to EXT for
source unit with
subwoofer outputs
FRONT LP creates
bandpass when rear
output is set to HP
KAPPA 255a
(top panel)
Figure 3. This wiring diagram shows a
Kappa 255a amplifier driving a front
set of tweeter/midrange components, a
rear pair of midbass speakers, and a
single subwoofer.
To Front L/R
Tweeters
To L/R
Midrange
Speakers
To L/R
Midbass
Speakers
To Rear L/R
Speakers
To Subwoofer(s)
Front L/R Inputs
(from Source Unit)
Subwoofer Inputs
(from Source Unit)
Rear L/R Inputs
(from Source Unit)
L/R Outputs
(Low-Pass)
Front L/R Inputs
KAPPA 52a
KAPPA 52a
KAPPA 255a
50w x 4 + 200W x 1
255a
ST
BR
HP
FLAT
LP
.25V
9V
G
A
I
N
G
A
I
N
G
A
I
N
M
O
D
E
M
O
D
E
O
U
T
P
U
T
C
R
O
S
S
O
V
E
R
.25V
9V
.25V
9V
80Hz
20Hz
320Hz
32Hz
60
Hz
Q
FREQ
REAR
INPUT
SUB
INPUT
MIN
MAX
320Hz
32Hz
320Hz
32Hz
HP
FLAT
LP
FRONT LP
EXT
INT
EXT
ST
BR
SUBWOOFER
FRONT REAR
50W X 4
+
200W CLASS D
DIGITAL SUBWOOFER
AMPLIFIER
O
U
T
P
U
T
C
R
O
S
S
O
V
E
R
D
B
O
X
O
V
E
R
x1
x15
SUBWOOFER
REAR
INPUT
FRONT LP
EXT
ST
BR
HP
FLAT
LP
O
U
T
P
U
T
C
R
O
S
S
O
V
E
R
FRONT
x1
x15
ST
BR
HP
FLAT
LP
O
U
T
P
U
T
REAR
SUB
INPUT
INT
EXT
Figure 4. In this expanded
system, a Kappa 52a
drives a front pair of
tweeters. The 52a’s low-
pass outputs feed a Kappa
255a to drive stereo pairs
of midrange and midbass
speakers. An external
subwoofer signal feeds the
Kappa 255a to drive the
subwoofer(s). Another
Kappa 52a drives a rear
pair of speakers from the
source unit’s rear outputs.
SYSTEM EXPANSION